Detcon IR-700 - Sensor Electronics Design; Intelligent Transmitter Module; Modular Mechanical Design

Model IR-700
Model IR-700 iii
Table of Contents
1. Introduction ..................................................................................................................................................1
1.1 Description .......................................................................................................................................... 1
1.1.1 Non-Dispersive Infrared (NDIR) Optical Sensor Technology ....................................................... 1
1.1.2 Principle of Operation .................................................................................................................... 2
1.1.3 Performance Characteristics ........................................................................................................... 2
1.2 Sensor Electronics Design .................................................................................................................. 3
1.2.1 Intelligent Transmitter Module ....................................................................................................... 3
1.3 Modular Mechanical Design ............................................................................................................... 3
1.4 Plug-in Replaceable Sensor ................................................................................................................ 4
2. Installation ....................................................................................................................................................5
2.1 Operational Guidelines for Safe Use – HazLoc Certifications ........................................................... 5
2.2 Sensor Placement ................................................................................................................................ 6
2.3 Sensor Contaminants and Interference ............................................................................................... 7
2.4 Mounting Installation .......................................................................................................................... 7
2.5 Electrical Installation ........................................................................................................................ 10
2.6 Field Wiring ...................................................................................................................................... 11
2.7 Initial Start Up................................................................................................................................... 13
3. Operation .................................................................................................................................................... 15
3.1 Programming Magnet Operating Instructions ................................................................................... 15
3.2 Operator Interface ............................................................................................................................. 16
3.3 Normal Operation ............................................................................................................................. 17
3.4 Calibration Mode (AutoZero and AutoSpan) ................................................................................... 18
3.4.1 AutoZero ....................................................................................................................................... 18
3.4.2 AutoSpan ...................................................................................................................................... 18
3.5 Program Mode .................................................................................................................................. 20
3.5.1 View Sensor Status ....................................................................................................................... 21
3.5.2 Set AutoSpan Level ...................................................................................................................... 22
3.5.3 Set Gas Type& Range .................................................................................................................. 23
3.5.4 Set Gas Factor ............................................................................................................................... 23
3.5.5 Set Serial ID ................................................................................................................................. 24
3.5.6 Set Sensor Gain ............................................................................................................................ 25
3.5.7 Signal Output Check ..................................................................................................................... 25
3.5.8 Restore Factory Defaults .............................................................................................................. 26
3.6 Program Features .............................................................................................................................. 26
3.6.1 Operational Features ..................................................................................................................... 27
3.6.2 Fault Diagnostic/Fail-Safe Features ............................................................................................. 27
4. RS-485 Modbus™ Protocol ....................................................................................................................... 30
Content Description............................................................................................................................................. 30
5. Service and Maintenance ............................................................................................................................ 32
5.1 Calibration Frequency ....................................................................................................................... 32
5.2 Visual Inspection .............................................................................................................................. 32
5.3 Condensation Prevention Packet ....................................................................................................... 32
5.4 Replacement of IR Plug-in Combustible Gas Sensor ....................................................................... 32
5.5 Replacement of ITM ......................................................................................................................... 33
5.6 Replacement of IR-700 Sensor Assembly ........................................................................................ 34
6. Troubleshooting Guide ............................................................................................................................... 35
7. Customer Support and Service Policy ........................................................................................................ 38
8. IR-700 Sensor Warranty ............................................................................................................................. 39
9. Appendix .................................................................................................................................................... 40
9.1 Specifications .................................................................................................................................... 40
9.2 Spare Parts, Sensor Accessories, Calibration Equipment ................................................................. 43